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    Home > Food News > Food Articles > The key technical principles of the "Agricultural Product Quality and Safety Risk Assessment" innovation team of the Institute of Agricultural Quality Standards and Testing Technology of the Chinese Academy of Agricultural Sciences in the rapid detection of heavy metals

    The key technical principles of the "Agricultural Product Quality and Safety Risk Assessment" innovation team of the Institute of Agricultural Quality Standards and Testing Technology of the Chinese Academy of Agricultural Sciences in the rapid detection of heavy metals

    • Last Update: 2021-12-24
    • Source: Internet
    • Author: User
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    Editor in charge: Food Science

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    Recently, the "Agricultural Product Quality and Safety Risk Assessment" innovation team of the Institute of Agricultural Quality Standards and Testing Technology of the Chinese Academy of Agricultural Sciences has made important progress in the key technical theory of rapid heavy metal detection, and for the first time proposed the enhancement of heavy metal element transmission based on electrothermal evaporation microplasma Technology reveals the morphological evolution mechanism of heavy metal atoms and their nanoparticles during the transportation process
    .
    Relevant research results have been published in the journal "
    Analytical Chemistry ( Analytical Chemistry )" of the American Chemical Society (ACS) as the cover article of the journal
    .
    The corresponding authors of the paper are Professor Liu Jixin, Senior Engineer and Mao Xuefei, Associate Researcher

    According to Associate Researcher Mao Xuefei, heavy metal pollution in agricultural products, especially grains, vegetables, and aquatic products, has attracted much attention in recent years.
    However, conventional heavy metal detection techniques are time-consuming and laborious, and cannot be quickly analyzed on site, and it is difficult to detect in time on the field and on the production line.
    Heavy metal pollution, so as to take effective prevention and control measures

    .
    Electrothermal evaporation technology (ETV) can directly analyze solid samples without complicated sample processing, and is fast, green and efficient

    .
    However, this technology has been constrained by the low transmission efficiency of the target element and the interference of the complex sample matrix, which affects the accurate determination of heavy metals

    .
    The research developed for the first time a micro-plasma transmission enhancement technology based on dielectric barrier discharge.
    The transmission efficiency of electrothermal evaporation to introduce arsenic reached 100%, and the use of micro-plasma quartz trap technology to achieve the elimination of matrix interference for solid injection; at the same time, it was revealed The evolution mechanism of molecular and atomic morphology of heavy metal arsenic in the process of evaporation, transmission, capture and release has provided basic theory and technical reserves for further realizing the on-site and miniaturization of heavy metal rapid measuring instruments

    .


    Project funding

    The research was supported by the National Natural Science Foundation of China and the Science and Technology Innovation Project of the Chinese Academy of Agricultural Sciences
    .


    Corresponding author profile

    Liu Jixin, Professor-level Senior Engineer

    Jixin Liu received a bachelor's degree and a doctorate degree in physical chemistry from the School of Chemistry, Peking University in 1997 and 2004, and is a professor-level senior engineer
    .
    Mainly engaged in the rapid detection of heavy metals, ultraviolet generation, solid sample introduction technology and sample preparation technology research, have certain accomplishments in academic research and product development

    .
    Published more than 40 papers in domestic and foreign journals, including more than 20 SCI papers, including high-level journals such as
    Anal Chem and Analyst ; participated in the compilation of 3 monographs, with 1 as an associate editor; more than 30 authorized patents, including the first invention There are 1 US patent and 11 Chinese invention patents.
    The various analytical instruments developed by him have won the BCEIA Gold Medal, the highest award of China’s instruments twice; in 2012, he was awarded the title of the 21st Beijing Outstanding Young Engineer Model

    .
    Presided over the Ministry of Science Instrument major projects "for on-site, fast, atomic spectroscopy systems and Natural Science Foundation project accurate determination of" spontaneous monolayer dispersion theory for solid sampling to detect trace amounts of heavy metals in food "and so on

    .

    Mao Xuefei Associate Researcher

    Xuefei Mao, Ph.
    D.
    , Associate Researcher, Master's Supervisor, Editorial Board Member of "Atomic Spectroscopy" Journal, Member of the First Atomic Spectroscopy Application and Technology Professional Committee of Inspection and Testing Equipment Branch of China Quality Inspection Association, Science and Technology Innovation Project of Chinese Academy of Agricultural Sciences "Agricultural Product Quality Safety Risk Member of the innovation team of "Monitoring and Risk Assessment Technology Research", and a member of the "Scientific Talent Cultivation Project" of the Young Talents Program of the Chinese Academy of Agricultural Sciences

    .
    Mainly engaged in the research of agricultural product quality and safety standards, detection technology and risk assessment, focusing on the fields of gas-phase enrichment technology for rapid detection of heavy metals and forms, electrothermal evaporation technology, dielectric barrier discharge technology and miniaturization of spectroscopic instruments

    .
    Analytical Chemistry, Analytica Chimica Acta, Microchimica Acta, Atmospheric Environment, Scientific Reports, Plant Method, Analytical Methods, AtomicSpectroscopy, Chemistry Letters, Journal of Agricultural Machinery , "Journal of Analysis and Testing", "Chinese Food and Nutrition", "Agricultural Product Quality and Safety", "Progress in Fishery Science" and other journal reviewers

    .

    Presided over 1 project of the National Natural Science Foundation of China (solid sampling detection of food trace heavy metals in porous carbon material near torch evaporation-ICP technology and mechanism research, 2013-2016), national key research and development project 1 project (new atomic fluorescence spectrometer in agriculture Application demonstration of heavy metal detection in key high-risk samples in the field, 2016-2021), sub-project 1 (research and standard development of soil heavy metal non-digestion detection technology and equipment based on electrothermal evaporation atomic trap, 2017-2020), agricultural industry standard development project 3 items (Formulation of "Technical Specification for Evaluation of Soil Heavy Metal Rapid Detection Instruments"; formulation of "Catalytic Pyrolysis-Atomic Fluorescence Spectrometry for the Determination of Mercury in Farmland Soil", 2018; formulation of "Catalytic Pyrolysis-Gold Amalgam Method for Determination of Mercury in Fertilizers" 》, 2019), a number of basic scientific research business fee projects for central scientific research institutes (Research on Dielectric Barrier Discharge Gas-phase Enrichment Mechanism and Application Technology, 2018-2020; Soil Heavy Metal Analysis Matrix Interference Mechanism and On-site Rapid Quantitative Research, 2019-2020) , Participate in a number of national/provincial-level projects such as the National Natural Science Foundation, major instrument and equipment development, industry technology, and national agricultural product risk assessment
    .

    SCI included 25 papers (3 Analytical Chemistry), cumulative IF="89.
    029, of which 17 were the first author/corresponding author (13 of IF>3); EI included 2 papers, 19 Chinese core journals, and one of them / Newsletter 11.
    The

    first inventor has obtained 11 national patents, including 2 invention patents and 9 utility model patents
    .
    The first/second completer has published 8 agricultural industry standards and participated in drafting and publishing 20 national and industry standards

    The editor-in-chief of 1 book ("New Atomic Trap Spectroscopic Analysis Technology and Food Safety Application"), the associate editor of 1 book, and the co-editing of 2 books
    .
    In 2016, the first author won the Science and Technology Award of China Association for Analysis and Testing (CAIA Award) Youth Award: In 2019, the second completion person won the second prize of Guangdong Science and Technology Progress Award

    .


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